Nitride bonded silicon carbide burning plate is a kind of high-grade refractory material with silicon carbide sand as the main raw material and silicon nitride as the bonded phase. Since SiC and Si3N4 are covalent bond compounds, sintering is difficult, and it is usually prepared by reaction sintering in industrial production. Using SiC as aggregate, adding metal silicon powder, selecting reasonable particle grading, mixing system and forming process, the dried billet is fired in a special sintering equipment under nitrogen atmosphere. In the firing process, the generated Si3N4(matrix binding phase) is an off-white crystal, which can effectively combine SiC particles (aggregates) together to form a spatial network structure, so that the brick has unmatched characteristics of other refractory materials. Silicon nitride combined with silicon carbide material is foreign developed countries such as the United States Norton, Carborundum company, Germany An-nawevrk, HTK company, Japan TKR, NGK company is equal to the 1970s applied to grinding wheels, ceramics, electric porcelain and other industries of a silicon carbide special brick. The material was introduced into China in the mid-1980s, and after many years of promotion and application, the superior properties of silicon nitride combined with silicon carbide materials are gradually understood.
